Which grouping has the least complex body plan? If you were on a research expedition in the kingdom of Tonga, a coral atoll in the South Paciﬁc, would you ﬁnd these organisms?
The Kingdom of Tonga is a Polynesian Archipelago in Oceania consisting of 176 islands. During a month long coral reef research mission in Tonga, the Foundation focused on islands in the Ha’aipi group, Vava’u and Niuatoputapu. Haʻapai, directly west of the Tonga trench in the central part of Tonga, is made up of 51 volcanic islands and includes Kao, the highest point in the kingdom (1,046 m). Vavaʻu has one large island and 40 smaller ones, and includes the second largest city, a large harbor. The north side of the main island is lined by 200 m high cliffs and extensive open network of fjord-like channels that stretch inland on the north side. Nearly 300 km north of Vavaʻu, close to the border of Samoa is Niuatoputapu, a sparsely inhabited (population 150) eroded remnant of a volcano surrounded by a large uplifted reef. This island was badly damaged by a tsunami following a submarine earthquake off Samoa in 2009.
A trisubstituted cyclohexane compound is given below in its chair conformation. Draw the corresponding planar (overhead) representation, using wedge-and-dash bonds to indicate the substituent positions. To be graded properly, include the hydrogen atoms on the chirality centers (asymmetric carbons). Be sure that both wedge/dash bonds are drawn on the outside of the ring, or else the stereochemistry may be interpreted as square planar.
I hope it helps.
The plant was alive for 1155 years
Any radioactive decay process follows the exponential law which is mathematically expressed as:
where N(0) = initial amount of the radioactive material
N(t) = amount at time t
k = decay constant
The decay constant is in turn related to the half-life t1/2
It is given that t1/2 of 14C = 5730yrs. Therefore:
In addition it is mentioned that:
N(t) = 1/4*N(0)
substituting this in equation (1) gives:
t = 1155 years
The velocity of a car goes from 0 m/s to 60 m/s in a forward direction. What is the best explanation for this change? When the speed was 0 m/s, the forces acting on the car were unbalanced. When the forces became balanced, the car started to move. When the velocity was 0 m/s, all the forces acting on the car were balanced. The velocity changed because at least one unbalanced force is acting on the car. When the inertia was constant, the speed was 0 m/s. The speed changed because the inertia of the car increased. The force of gravity on all sides was equal at 0 m/s. The velocity of the car increased because the force of gravity on the back of the car increased.
The answer is B
I'm glad I could help!
Two new planets with equal masses are discovered. Planet A is twice as far from the sun as Planet B. Which of the following is true? A. The gravitational pull between Planet A and the sun is smaller than the gravitational pull between Planet B and the sun. B. The sun's gravitational pull on Planet A is equal to its gravitational pull on Planet B because distance does not affect gravity. C. The gravitational pulls between the sun and each of the planets are the same because the masses of the planets are the same. D. The sun will attract Planet B and repel Planet A.
What is the relationship between the atomic numbers and ionic radii of the elements in the group 2A? What is the relationship between atomic numbers and first ionization energies? (2A group) Why do these relationships exist? Propose an explanation for each of these relationships. (2A group) Are these relationships consistent with the periodic trends that you have been studying? (2A group)
As the atomic number increases, the first ionization energy decreases.
These trends both exists because as we proceed down the group, the size of the atom increases due to addition of an electron shell. The increased number of electrons increase the shielding effect, meaning the ion is not held together as tightly, increasing its size, and the outer most electrons are not pulled towards the nucleus as strongly, making it easier to remove them.
Atomic Number, Ionic Radius, and First Ionization Energy help! "Why do these relationships exist? Propose an explanation for each of these relationships." and "Are these relationships consistent with the periodic trends that you have been studying?"
Why do these relationships exist?: The higher the atomic number of an element means the atomic radii will be bigger because there are more electrons and shells/orbitals involved which will make the element bigger in size. The more electrons there are means the more shells there are which equals to a bigger atomic radii. The first energisation energy will be lower the bigger the atomic number because a larger atomic number means more electrons. This means more shells and the electrons will be further away from the nucleus which equals to less nuclear attraction. This means as the electrons get further away from the nucleus (from the larger amount of electrons and more shells and shielding from the shells closer to the nucleus) there will be less attraction holding the electrons to the nucleus which will make it easier to remove. I'm not sure what the next question means, but I hope this helps explain why the relationships exist :)
What is true of saturated fatty acid chains? a. They are more healthy that unsaturated fats. b. They contain only single covalent bonds. c. They are only made in leaf cells of green plants. d. They contain at least one double or triple bond.
Although the side chains may contain double bonds, the main chain of a saturated fatty acid molecule contains only single covalent bonds, which is why it is referred to as being "saturated".
Do hope it will help you! Regards.
QUESTION OF THE DAY! A student found a spider, tick, fly, and a bee in his backyard. After studying their bodies and doing some research, he concluded that their _____ performs the major life functions. Wings Legs Eyes Cells
Kumar is producing the photoelectric effect by using red light. He wants to increase the energy of emitted electrons. Based on the research of Albert Einstein, what is the best way for him to do this?
Photoelectric effect: Electrons are ejected out from the surface of metal when light of sufficient frequency falls upon shiny surface of metals. light is made up small bundles of energy packets named photons which when falls on surface transfer their energy to electrons due which electrons ejects out of the metallic surface. The energy for one photon was given by expression:
h=Planck's constant, = frequency of the light
Kumar can increase the energy of emitted electron by using light with higher value of frequency than the frequency of red light. This is because the energy carried by the photon of a light is directly proportional to the frequency of the light. Higher the value of frequency of light higher will be the value of energy of a photon. And photon with higher energy will impart more amount of energy to an electron while ejection.
2 * 2.02g + 32.00g = 2 * 18.02g
The total mass of the reactants, 36.04g, is exactly equal to the total mass of the products, 36.04g This holds true for all balanced chemical equations.
In Secondary structure of Proteins, they organised into regular structures known as alpha-helices (alpha-helixes) and beta-pleated sheets.
Hope this helps!
a low pressure area would have a clockwise turning and a high pressure area would have a counterclockwise turnig
and will never become smart
Which of the following best describes the use of a nonrenewable resource? (2 points) California has several power plants that use heat from the Earth to generate electricity. In the state of Texas, you can find miles of windmills that are used to generate electricity. Natural gas is a great alternative to electricity for cooking. The electronic signs along the highway are run by solar power.
Auroras are lights that appear at Earth’s northern and southern poles. What is the main cause of an aurora? A) Solar wind enters Earth’s atmosphere, and particles interact with ions. B) Bubbles of gas are ejected from Earth’s outer crust. C) Sunlight reflects off the surface of the Moon during an eclipse. D) The northern and southern poles are cooler than the rest of Earth.